bug#63840: 29.0.91; c-ts-mode fails to fontify common C extension

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,  Theodor Thornhill <theo@thornhill.no>,
>   63840@debbugs.gnu.org
> Date: Thu, 08 Jun 2023 16:50:21 +0800
> 
> Yuan Fu <casouri@gmail.com> writes:
> 
> > Yeah. So is this the only way $ is used in C?
> 
> Yes.
> 
> > Could it appear in contexts other than identifiers?
> 
> No.

Ping!  Any progress with this?